WebM to MP3 Converter
Save the sound from a WebM clip as an MP3 you can play offline.
Up to 50 MB per file. Sign up free to convert files up to 100 MB.
| File name | Size | Convert to |
|---|
Pick a format to convert to.
Checking files and selected output formats.
WebM to MP3: Opus or Vorbis into MP3
WebM audio is Opus on anything recent, Vorbis on older files, both royalty-free codecs chosen for the web, and both more efficient than MP3 at the same bitrate. Converting decodes to raw samples and re-encodes to MP3, which means moving to a less efficient codec and taking a second generation of loss to gain compatibility.
Convert when the destination will not play WebM: car stereos, older players, some editing software. There is no quality argument for this conversion, only a compatibility one.
WebM vs MP3: side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | WebM | MP3 |
|---|---|---|
| Full name | WebM (Google) | MPEG-1 Audio Layer III |
| Year introduced | 2010 | 1993 |
| Developer / standard body | Fraunhofer / MPEG | |
| MIME type | video/webm | audio/mpeg |
| File extension | .webm | .mp3 |
| Compression | VP8/VP9/AV1 video + Vorbis/Opus audio | Lossy (MDCT) |
| Color / data depth | 8/10/12-bit | N/A (audio) |
| Max dimensions / size | Codec-dependent | Up to 320 kbps bitrate |
| Transparency | Yes | No |
| Animation | No | No |
| Standard / specification | Open Web Foundation | ISO/IEC 11172-3 |
| Best for | Web-native video, HTML5 <video> tag | Universal audio compatibility, playable on every device |